DevHub example of ProcessReceipt doesn't work

Help and Feedback Scripting Support
#1

Using the DevHub example of ProcessReceipt I print and do other stuff when a product is bought. However, “HI GUYS” doesn’t print:

productFunctions[PRODUCT_ID] = function(receipt, player)
	print("HI GUYS")
	local playerInfo = player:FindFirstChild("PlayerInfo")
	local coins = playerInfo and playerInfo.Values.Coins
	if coins then
		coins.Value += 50
		return true
	end
end

-- The core 'ProcessReceipt' callback function
local function processReceipt(receiptInfo)
	-- Determine if the product was already granted by checking the data store  
	local playerProductKey = receiptInfo.PlayerId .. "_" .. receiptInfo.PurchaseId

	local success, isPurchaseRecorded = pcall(function()
		return purchaseHistoryStore:UpdateAsync(playerProductKey, function(alreadyPurchased)
			if alreadyPurchased then
				return true
			end

			-- Find the player who made the purchase in the server
			local player = Players:GetPlayerByUserId(receiptInfo.PlayerId)
			if not player then
				-- The player probably left the game
				-- If they come back, the callback will be called again
				return nil
			end

			local handler = productFunctions[receiptInfo.ProductId]

			local success, result = pcall(handler, receiptInfo, player)
			-- If granting the product failed, do NOT record the purchase in datastores.
			if not success or not result then
				error("Failed to process a product purchase for ProductId:", receiptInfo.ProductId, " Player:", player)
				return nil
			end

			-- Record the transcation in purchaseHistoryStore.
			return true
		end)
	end)

	if not success then
		error("Failed to process receipt due to data store error.")
		return Enum.ProductPurchaseDecision.NotProcessedYet
	elseif isPurchaseRecorded == nil then
		-- Didn't update the value in data store.
		return Enum.ProductPurchaseDecision.NotProcessedYet
	else	
		-- IMPORTANT: Tell Roblox that the game successfully handled the purchase
		return Enum.ProductPurchaseDecision.PurchaseGranted
	end
end

-- Set the callback; this can only be done once by one script on the server! 
MarketPlaceService.ProcessReceipt = processReceipt
#2

PRODUCT_ID is meant to the be the id of the developer product that should have that specific function

#3

PRODUCT_ID is already set, just not included that. I am sure that the ID is for a product owned by the game because I safely checked that… 3 times

#4

Can you add some more prints around the process receipt to see where the code stops working? Looking through doesn’t easily show anything wrong

#5

Using the following function, only 1, 2 and 7 print:

local function processReceipt(receiptInfo)
	-- Determine if the product was already granted by checking the data store  
	local playerProductKey = receiptInfo.PlayerId .. "_" .. receiptInfo.PurchaseId
	print("1")
	local success, isPurchaseRecorded = pcall(function()
		print("2")
		return purchaseHistoryStore:UpdateAsync(playerProductKey, function(alreadyPurchased)
			print("3")
			if alreadyPurchased then
				return true
			end

			-- Find the player who made the purchase in the server
			print("4")
			local player = Players:GetPlayerByUserId(receiptInfo.PlayerId)
			if not player then
				-- The player probably left the game
				-- If they come back, the callback will be called again
				return nil
			end
			print("5")
			local handler = productFunctions[receiptInfo.ProductId]

			local success, result = pcall(handler, receiptInfo, player)
			-- If granting the product failed, do NOT record the purchase in datastores.
			if not success or not result then
				error("Failed to process a product purchase for ProductId:", receiptInfo.ProductId, " Player:", player)
				return nil
			end
			print("6")
			-- Record the transcation in purchaseHistoryStore.
			return true
		end)
	end)
	print("7")
	if not success then
		error("Failed to process receipt due to data store error.")
		return Enum.ProductPurchaseDecision.NotProcessedYet
	elseif isPurchaseRecorded == nil then
		-- Didn't update the value in data store.
		return Enum.ProductPurchaseDecision.NotProcessedYet
	else	
		-- IMPORTANT: Tell Roblox that the game successfully handled the purchase
		return Enum.ProductPurchaseDecision.PurchaseGranted
	end
end

I think I might have to make my own ProcessReceipt function

#6

I think you can make do without the datastore stuff, checking out their new wiki shows that they don’t do anything with datastoring, try using their new example instead?

1 Like
#7

Alright, I’ll edit the script and let you know how that goes

#8

Well that seemed to work, making the script in ServerScriptService and not the Shop Menu made it globally too, thanks!

1 Like
#9

Did you attempt to use the snippet inside a local script? ‘DataStore’ instances can only be accessed by the server.

#10

It was already on a server script, both times.